Question 1

Describe an atom and what it is made up of according to modern atomic theory.

Accepted Answer

An atom is made up of a nucleus surround

Question 2

Dalton's atomic theory states

Accepted Answer

A) that all elements have several isotopes. 
B) that matter is composed of small indestructible particles. 
C) that the properties of matter are determined by the properties of atoms. 
D) that energy is neither created nor destroyed during a chemical reaction. 
E) that an atom is predominantly empty space. 
A) that all elements have several isotopes. 
B) that matter is composed of small indestructible particles. 
C) that the properties of matter are determined by the properties of atoms. 
D) that energy is neither created nor destroyed during a chemical reaction. 
E) that an atom is predominantly empty space.

Question 3

How many protons (p)and neutrons (n)are in an atom of barium-130?

Accepted Answer

A) 56 p,74 n 
B) 56 p,130 n 
C) 74 p,56 n 
D) 130 p,56 n 
A) 56 p,74 n 
B) 56 p,130 n 
C) 74 p,56 n 
D) 130 p,56 n

Question 4

An atom of 82Kr contains ________ neutrons.

Accepted Answer

A) 36 
B) 118 
C) 46 
D) 80 
E) 82 
A) 36 
B) 118 
C) 46 
D) 80 
E) 82

Question 5

Isotopes differ in the number of what particle?

Accepted Answer

A) beta particles 
B) protons 
C) electrons 
D) neutrons 
E) gamma particles 
A) beta particles 
B) protons 
C) electrons 
D) neutrons 
E) gamma particles

Question 6

What element is defined by the following information? p+ = 17 n° = 20 e- = 17

Accepted Answer

A) calcium 
B) rubidium 
C) chlorine 
D) neon 
E) oxygen 
A) calcium 
B) rubidium 
C) chlorine 
D) neon 
E) oxygen

Question 7

What is the element symbol for an atom that has 5 protons and 6 neutrons?

Accepted Answer

A) B 
B) C 
C) H 
D) Na 
A) B 
B) C 
C) H 
D) Na

Question 8

What element is defined by the following information? p+ = 11 n° = 12 e- = 11

Accepted Answer

A) sodium 
B) vanadium 
C) magnesium 
D) titanium 
A) sodium 
B) vanadium 
C) magnesium 
D) titanium

Question 9

What element is defined by the following information? p+ = 20 n° = 20 e- = 20

Accepted Answer

A) zirconium 
B) calcium 
C) potassium 
D) neon 
E) argon 
A) zirconium 
B) calcium 
C) potassium 
D) neon 
E) argon

Question 10

Why do elements in the same group tend to have similar chemical properties?

Accepted Answer

Since elements in the same group have th

Question 11

Which of the following describes a metal?

Accepted Answer

A) poor conductor of heat 
B) good conductor of electricity 
C) tends to gain electrons 
D) forms ionic compounds with group 18 elements 
E) found on the upper right corner of the periodic table 
A) poor conductor of heat 
B) good conductor of electricity 
C) tends to gain electrons 
D) forms ionic compounds with group 18 elements 
E) found on the upper right corner of the periodic table

Question 12

How many argon atoms are contained in 7.66 × 105 mmol of argon?

Accepted Answer

A) 4.61 × 1026 Ar atoms 
B) 1.84 × 1028 Ar atoms 
C) 1.15 × 1028 Ar atoms 
D) 7.86 × 1020 Ar atoms 
E) 3.24 × 1026 Ar atoms 
A) 4.61 × 1026 Ar atoms 
B) 1.84 × 1028 Ar atoms 
C) 1.15 × 1028 Ar atoms 
D) 7.86 × 1020 Ar atoms 
E) 3.24 × 1026 Ar atoms

Question 13

When forming an ion,oxygen,O,will normally ________ electron(s).

Accepted Answer

A) gain one 
B) gain two 
C) gain three 
D) lose one 
E) lose two 
A) gain one 
B) gain two 
C) gain three 
D) lose one 
E) lose two

Question 14

What is the chemical symbol for mercury?

Accepted Answer

A) Ag 
B) Au 
C) Hg 
D) Pb 
A) Ag 
B) Au 
C) Hg 
D) Pb

Question 15

When forming an ion,beryllium,Be,will ________ electron(s).

Accepted Answer

A) gain one 
B) gain two 
C) gain three 
D) lose one 
E) lose two 
A) gain one 
B) gain two 
C) gain three 
D) lose one 
E) lose two

Question 16

How many xenon atoms are contained in 2.36 moles of xenon?

Accepted Answer

A) 3.92 × 1024 xenon atoms 
B) 2.55 × 1023 xenon atoms 
C) 1.42 × 1024 xenon atoms 
D) 7.91 × 1025 xenon atoms 
E) 1.87 × 1026 xenon atoms 
A) 3.92 × 1024 xenon atoms 
B) 2.55 × 1023 xenon atoms 
C) 1.42 × 1024 xenon atoms 
D) 7.91 × 1025 xenon atoms 
E) 1.87 × 1026 xenon atoms

Question 17

What mass (in mg)does 2.63 moles of nickel have?

Accepted Answer

A) 44.8 mg 
B) 2.23 × 104 mg 
C) 129 mg 
D) 3.56 × 105 mg 
E) 1.54 × 105 mg 
A) 44.8 mg 
B) 2.23 × 104 mg 
C) 129 mg 
D) 3.56 × 105 mg 
E) 1.54 × 105 mg

Question 18

What mass of calcium is required to produce 4.2 g of calcium bromide,starting with 3.4 g of bromine?

Accepted Answer

A) 0.4 g 
B) 3.4 g 
C) 4.2 g 
D) 1.6 g 
E) 0.8 g 
A) 0.4 g 
B) 3.4 g 
C) 4.2 g 
D) 1.6 g 
E) 0.8 g

Question 19

All samples of a given compound,regardless of their source or how they were prepared,have the same proportions of their constituent elements.Which law does this refer to?

Accepted Answer

A) Law of definite proportions 
B) Law of the conservation of mass 
C) Law of modern atomic theory 
D) Law of multiple proportions 
E) First law of thermodynamics 
A) Law of definite proportions 
B) Law of the conservation of mass 
C) Law of modern atomic theory 
D) Law of multiple proportions 
E) First law of thermodynamics

Question 20

Cerium has four stable isotopes listed below.If the weighted average atomic mass of cerium is 140.116 u,calculate the atomic mass of cerium-142. 
Ce-136$\quad$ 135.90714 u $\quad$0.19%
Ce-138$\quad$ 137.90599 u $\quad$0.25%
Ce-140$\quad$ 139.90543 u $\quad$88.43%
Ce-142$\quad$ $\quad$$\quad$$\quad$$\quad$$\quad$ 11.13%

Accepted Answer

A) 141.911 u 
B) 142.617 u 
C) 140.334 u 
D) 142.501 u 
E) 139.886 u 
A) 141.911 u 
B) 142.617 u 
C) 140.334 u 
D) 142.501 u 
E) 139.886 u

Exam 2: Atoms and Elements

Describe an atom and what it is made up of according to modern atomic theory.

Dalton's atomic theory states

How many protons (p)and neutrons (n)are in an atom of barium-130?

An atom of 82Kr contains ________ neutrons.

Isotopes differ in the number of what particle?

What element is defined by the following information? p+ = 17 n° = 20 e- = 17

What is the element symbol for an atom that has 5 protons and 6 neutrons?

What element is defined by the following information? p+ = 11 n° = 12 e- = 11

What element is defined by the following information? p+ = 20 n° = 20 e- = 20

Why do elements in the same group tend to have similar chemical properties?

Which of the following describes a metal?

How many argon atoms are contained in 7.66 × 105 mmol of argon?

When forming an ion,oxygen,O,will normally ________ electron(s).

What is the chemical symbol for mercury?

When forming an ion,beryllium,Be,will ________ electron(s).

How many xenon atoms are contained in 2.36 moles of xenon?

What mass (in mg)does 2.63 moles of nickel have?

What mass of calcium is required to produce 4.2 g of calcium bromide,starting with 3.4 g of bromine?

All samples of a given compound,regardless of their source or how they were prepared,have the same proportions of their constituent elements.Which law does this refer to?

Units of Measurement for Physical and Chemical Change

Molecules,compounds,and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, valence Bond Theory, and Molecular Orbital Theory

Liquids, solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

An atom of ⁸²Kr contains ________ neutrons.

What element is defined by the following information? p⁺ = 17 n° = 20 e^- = 17

What element is defined by the following information? p⁺ = 11 n° = 12 e^- = 11

What element is defined by the following information? p⁺ = 20 n° = 20 e^- = 20

How many argon atoms are contained in 7.66 × 10⁵ mmol of argon?